High quality photographs from the Agricultural Research Service. Images are copyright free and/or in the public domain unless otherwise indicated.
Collection of over one hundred and sixty digital images of historic posters from 1880-1918. All works are in the public domain under United States Copyright Law.
Two million images from the Research Institute's collection.
The Google Art Project is a collaboration between Google and 151 acclaimed art partners from across 40 countries. Users can explore a wide range of artworks at brushstroke level detail, take a virtual tour of a museum and build their own collections to share.
Images of artwork from the Museum's collection. See it's FAQ page and it's Terms and Conditions page before using any images.
Flicker account of NASA featuring high quality photographs.
Weather, space, and geographic images, most in the public domain. Photos that are known to have copyright restrictions are so noted in the caption information.
Credit MUST be given to the National Oceanic and Atmospheric Administration/Department of Commerce.
40,000 images from medical and social history. See the Terms and Conditions page before using any images.